MY2018 3.5 TLX. You can hear the crack noise around 0:04 in the video just after the engine rolls over. I will try to get a better clip with the hood open.

Any clues as to what this noise is or if it's normal? It's not the AC compressor, that kicks in just after I stopped the recording.

Thanks for any insight!

 

Could it be the starter motor disengaging from the fly wheel?

 

I'm not sure - that could be the culprit? But is that normal, I'm just trying to get a sense of if anyone else has ever had this noise before I take it in to the dealer.